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Finding the Fourth Proportional to 18,683,579.10, 28,025,368.65 and 5,220,407.10

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Solution

The fourth proportional to 18,683,579.10, 28,025,368.65 and 5,220,407.10 is: 7,830,610.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683,579.10 : 28,025,368.65 = 5,220,407.10 : x
  2. Step 2: Convert to fraction form
    18,683,579.10/28,025,368.65 = 5,220,407.10/x
  3. Step 3: Cross multiply
    18,683,579.10x = 28,025,368.65 × 5,220,407.10
  4. Step 4: Simplify right side
    18,683,579.10x = 146,303,833,480,577.41
  5. Step 5: Solve for x
    x = 146,303,833,480,577.41/18,683,579.10
  6. Step 6: Final answer
    x = 7,830,610.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.